Crustose lichens on an iron bridge when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight in Lick Creek ParkWeb page of Lick Creek Park by Dept. of Biology of TAMU. College Station, Texas

🎞️ #3609-02

The image showcases two photographs of crustose lichens on an iron bridge, one taken under regular daylight and the other illuminated by a 365 nm ultraviolet (UV-A) blacklight.

**Daylight Photograph**

* The top photograph depicts the lichens as they appear in natural light.
* They are primarily green or brownish-green in color, with some displaying subtle shades of red, blue, and yellow.
* The lichen's thallus appears to be flat and crust-like, adhering closely to the iron bridge surface.

**UV-A Blacklight Photograph**

* In contrast, the bottom photograph reveals a striking transformation when illuminated by UV-A light.
* The colors become more vibrant and pronounced, with many areas exhibiting bright reds, blues, and yellows.
* The lichen's thallus remains flat and crust-like but appears to be slightly raised or puffy in some areas.

**Key Observations**

* The use of UV-A light highlights the chemical compounds present in the lichens that absorb different wavelengths of light.
* This phenomenon is a common characteristic of many organisms, including fungi and plants, which often exhibit enhanced coloration when exposed to specific wavelengths of light.

Overall, the image effectively demonstrates how the application of UV-A light can reveal new details about the chemical composition and structure of crustose lichens. – AI vision

🇪🇸 Descripción en español / Spanish Description

Los líquenes crujientes en un puente de hierro al exponerlos a la luz diurna habitual, así como cuando se iluminan con una luz negra ultravioleta (UV-A) de 365 nm en Lick Creek Park. College Station, Texas, agosto 27, 2024. La imagen muestra dos fotografías de líquenes crujientes en un puente de hierro, una tomada bajo luz diurna habitual y la otra iluminada con una luz negra ultravioleta (UV-A) de 365 nm. **Fotografía a la luz del día** * La fotografía superior representa los líquenes como aparecen en luz natural. * Son principalmente de color verde o verdoso-marrón, y algunos muestran tonalidades sutiles de rojo, azul y amarillo. * El tallo del líquen parece ser plano y similar a la costra, adhiriéndose estrechamente a la superficie del puente de hierro. **Fotografía bajo luz UV-A** * En contraste, la fotografía inferior revela una transformación sorprendente cuando se ilumina con luz UV-A. * Los colores se vuelven más vibrantes y pronunciados, mostrando muchas áreas de rojos brillantes, azules y amarillos. * El tallo del líquen sigue siendo plano y parecido a la costra, pero parece estar ligeramente levantado o hinchado en algunas zonas. **Observaciones clave** * El uso de luz UV-A destaca los compuestos químicos presentes en los líquenes que absorben diferentes longitudes de onda de luz. * Este fenómeno es una característica común de muchos organismos, incluyendo hongos y plantas, que a menudo exhiben una coloración potenciada cuando se exponen a longitudes de onda específicas de la luz. En general, la imagen demuestra efectivamente cómo la aplicación de luz UV-A puede revelar nuevos detalles acerca de la composición química y la estructura de los líquenes crujientes. – Spanish translation

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